Date: Fri, 12 Oct 2012 18:49:08 +0000 (UTC) From: Neel Natu <neel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r241490 - projects/bhyve/usr.sbin/bhyve Message-ID: <201210121849.q9CIn8h9056988@svn.freebsd.org>
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Author: neel Date: Fri Oct 12 18:49:07 2012 New Revision: 241490 URL: http://svn.freebsd.org/changeset/base/241490 Log: Deal with transient EBUSY error return from vm_run() by retrying the operation. Modified: projects/bhyve/usr.sbin/bhyve/fbsdrun.c Modified: projects/bhyve/usr.sbin/bhyve/fbsdrun.c ============================================================================== --- projects/bhyve/usr.sbin/bhyve/fbsdrun.c Fri Oct 12 18:32:44 2012 (r241489) +++ projects/bhyve/usr.sbin/bhyve/fbsdrun.c Fri Oct 12 18:49:07 2012 (r241490) @@ -516,8 +516,19 @@ vm_loop(struct vmctx *ctx, int vcpu, uin while (1) { error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]); - if (error != 0) - break; + if (error != 0) { + /* + * It is possible that 'vmmctl' or some other process + * has transitioned the vcpu to CANNOT_RUN state right + * before we tried to transition it to RUNNING. + * + * This is expected to be temporary so just retry. + */ + if (errno == EBUSY) + continue; + else + break; + } prevcpu = vcpu; rc = (*handler[vmexit[vcpu].exitcode])(ctx, &vmexit[vcpu],
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